Does anyone have any suggestions for a 6 yr old boys birthday party that is coming up next month?

It will be my son’s first birthday party. I was thinking about letting him pick a friend or a few friends, but I have no idea what to do. My dilemma is this, I am a single Mom and currently unemployed so money is tight. I don’t want to do a big party in our apartment because it would be just too stressful in such a small place. My son’s birthday is Dec. 26th and that’s a bad time of yr for a party because everyone seems to be traveling for the holiday’s. I would like to have a birthday party before his actual birthday.